CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net unrealized gain, net of tax expense	$ 234	$ 615	$ 360
Pension and other postretirement benefits activity, tax benefit (expense)	$ 801	$ (7,078)	$ (2,256)